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The MERIT Experiment

The MERIT Experiment. NFMCC Collaboration Meeting UCLA January 29, 2007. Experimental Goals. Study single beam pulses with intensities up to 30TP Study influence of solenoid field strength on Hg jet dispersal (B o from 0 to 15T)

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The MERIT Experiment

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  1. The MERIT Experiment NFMCC Collaboration Meeting UCLA January 29, 2007

  2. Experimental Goals • Study single beam pulses with intensities up to 30TP • Study influence of solenoid field strength on Hg jet dispersal (Bo from 0 to 15T) • Study 50 Hz operations scenario • Study cavitation effects in the Hg jet by varying PS spill structure—Pump/Probe • Beam on target July 2007 • Confirm Neutrino Factory targetry concept The MERIT (nTOF11) Experiment

  3. The MERIT (nTOF11) Experiment MERcuryIntenseTarget

  4. Target Test Site at CERN

  5. The Tunnel Complex TT10 Hyd Pump & Controls in TT2 ISR MERIT TT2A TT2

  6. Profile of the Experiment • 14 and 24 GeV Proton beam • Up to 30 x 1012 Protons (TP) per 2s spill • Proton beam spot with r ≤ 1.5 mm rms • 1cm diameter Hg Jet • Hg Jet/Proton beam off solenoid axis • Hg Jet 33 mrad • Proton beam 67 mrad • Test 50 Hz operations • 20 m/s Hg Jet • 2 spills separated by 20 ms

  7. PS Beam Characteristics • PS will run in a harmonic 16 mode • We can fill any of the 16 rf buckets with sub-bunches at our discretion. • Each microbunch can contain up to 2.5 TP. • Fast extraction can accommodate entire 2s PS fill. • Extraction at 24 GeV • Partial/multiple extraction possible at 14 GeV • Beam on target July 2007

  8. Run plan for PS beam spills • The PS Beam Profile allows for: • Varying beam charge intensity from 4 TP to 30 TP. • Studying influence of solenoid field strength on beam dispersal • (vary Bo from 0 to 15T). • Study possible cavitation effects by varying PS spill structure (Pump/Probe) • Study 50 Hz operation.

  9. Key Experimental Sub-systems • 15T Pulsed Solenoid • 5.5 MVA Power Supply • LN2 Cryo-system • Hg Jet Delivery System (Van Graves) • Optical Diagnostics (H. Park) • CERN Infrastructure (I. Efthymiopoulos) • Simulations (Jian Du)

  10. High Field Pulsed Solenoid • 80o K Operation • 15 T with 5.5 MVA Pulsed Power • 15 cm warm bore • 1 m long beam pipe Peter Titus, MIT

  11. Pulsed Solenoid Milestones • Delivery to MIT January 06 • Reception Testing March 06 • Integration Testing February 07 • Ship to CERN February 07 • Installation at CERN March 07

  12. The Pulsed Solenoid 15T at MIT March 30, 2006 CVIP December 2005

  13. Layout of MIT Integration Test Pulsed Solenoid in the MIT test pit

  14. Cryosytem Layout LN2 and N2 gas stored on the surface. Cold valve box in the TT2 tunnel. Exhaust gas vented into TT10 tunnel through filtration system. ~ 150 liters of LN2 per Magnet pulse. Magnet flushed with N2 prior to each pulse, to minimize activation of N2.

  15. The Hg Jet System

  16. Nozzle A Nozzle B Nozzle C SS Nozzles • Nozzle A – diameter reduction after bend, 2.5° nozzle angle • Nozzle B – reduction before bend, 2.5° nozzle angle • Nozzle C – test nozzle with reduction after bend, straight nozzle tip, internally similar to nozzle A

  17. The Princeton Ti Nozzle

  18. The Princeton Ti Nozzle (cont) Beam Window

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